/**
 * Copyright (C), 2015-2019,
 * FileName: WebLogAspect
 * Author:   陈玉翔
 * Date:     2019-05-05 9:58
 * Description:
 * History:
 */

package com.example.workrecord.config;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Method;

/**
 *@ClassName: WebLogAspect
 *@Description WebLogAspect
 *@Author Mr.Bu
 *@Date 2020/4/26 11:15
 *@Version: 1.0
 */
@Aspect
@Component
// @Profile({"dev", "test"})
public class WebLogAspect {

    private static final Logger logger=LoggerFactory.getLogger(WebLogAspect.class);
    /** 换行符 */
    private static final String LINE_SEPARATOR=System.lineSeparator();

    @Pointcut("@annotation(com.example.workrecord.config.WebLog)")
    public void webLog() {
    }

    /**
     * 在切点之前织入
     * @param joinPoint
     * @throws Throwable
     */
    @Before("webLog()")
    public void doBefore(JoinPoint joinPoint) throws Throwable {
        // 开始打印请求日志
        ServletRequestAttributes attributes=(ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request=attributes.getRequest();

        // 获取 @WebLog 注解的描述信息
        String methodDescription=getAspectLogDescription(joinPoint);

        // 打印请求相关参数
        logger.info("========================================== Start ==========================================");
        // 打印请求 url
        logger.info("URL            : {}", request.getRequestURL().toString());
        // 打印描述信息
        logger.info("Description    : {}", methodDescription);
        // 打印 Http method
        logger.info("HTTP Method    : {}", request.getMethod());
        // 打印调用 controller 的全路径以及执行方法
        logger.info("Class Method   : {}.{}", joinPoint.getSignature().getDeclaringTypeName(), joinPoint.getSignature().getName());
        // 打印请求的 IP
        logger.info("IP             : {}", request.getRemoteAddr());
        // 打印请求入参
        logger.info("Request Args   : {}", joinPoint.getArgs());
    }

    /**
     * 在切点之后织入
     * @throws Throwable
     */
    @After("webLog()")
    public void doAfter() throws Throwable {
        // 接口结束后换行，方便分割查看
        logger.info("=========================================== End ===========================================" + LINE_SEPARATOR);
    }

    /**
     * 环绕
     * @param proceedingJoinPoint
     * @return
     * @throws Throwable
     */
    @Around("webLog()")
    public Object doAround(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
        long startTime=System.currentTimeMillis();
        Object result=proceedingJoinPoint.proceed();
        // 打印出参
//         logger.info("Response Args  : {}",  result);
        // 执行耗时
        logger.info("Time-Consuming : {} ms", System.currentTimeMillis() - startTime);
        return result;
    }

    /**
     * 获取切面注解的描述
     *
     * @param joinPoint 切点
     * @return 描述信息
     * @throws Exception
     */
    public String getAspectLogDescription(JoinPoint joinPoint) throws Exception {
        String targetName=joinPoint.getTarget().getClass().getName();
        String methodName=joinPoint.getSignature().getName();
        Object[] arguments=joinPoint.getArgs();
        Class targetClass=Class.forName(targetName);
        Method[] methods=targetClass.getMethods();
        StringBuilder description=new StringBuilder("");
        for (Method method : methods) {
            if (method.getName().equals(methodName)) {
                Class[] clazzs=method.getParameterTypes();
                if (clazzs.length == arguments.length) {
                    description.append(method.getAnnotation(WebLog.class).description());
                    break;
                }
            }
        }
        return description.toString();
    }
}